Nice work, but I'd recommend a holder form which does not require soldering, at least on the negative pole of the battery. Check out some bus-bar / single cell fuses / large patches layouts around here. The examples I posted use soldered connections, but the script can generate holders for bus-bar ...

Thanks for posting this, it's awesome! I could trim away the parts I don't need, in order to make any shape I wanted... I'm glad you like it. As for trimming away parts, that's probably not necessary. You can adjust the parameters in the script to make cell-holders for single cells or up to as many...

How many? You need to stamp the 2mm cap to create a tiny channel for the o ring, about 0.6-1mm deep. For 2pc, you can use a dremel. Than its just a matter of finding he right sized nitrile o ring. Thanks for the suggestion. I have 20 of these cases, so I won't be able to dremel them all. I'm thinki...

Awesome. 12FET should be the ultimate goal. This could become the ultimate controller for us fairly easily, if the design can scale to 100A capability. Bonus points if you can crank up the peak voltage handling to 96V. Don't get stuck on the TO-200 package though unless you have determined that the...

Awesome - count me in for testing. I always wanted to try VESC with regen on an ebike. Drilling new holes is not a problem. What might be is proper sealing. Never seen a KT-style controller stay completely dry. Once you have finalized the size, I can help you find o-ring sealed side caps for the al...

I have the USD-8A fork and I also need these parts. They were included with the fork when I bought it, but I broke one of them and it seems there is no glue that will hold it back together. I emailed DNM asking where I could buy these parts (dnm@dnmshock.com) They told me they charge $12 USD per set...

I'm also interested in a VESC compatible display. I am considering developing my own display, but my focus right now is on my custom VESC hardware, so I am not able to work on the display development yet. Your idea is interesting. If you plan to interface with a dashcam I can understand why you want...

Is there anyone, benjamin vedder or other company, developing a 100 v model? I am using 4.2 on ebike and it is superb, but I miss a 75 v PCB to operate my cyclone motor I'm working on a 12F VESC-compatible that can run up to 80V. It will use 100V mosfets, but the current sensors are limited to 80V....

Is there anyone, benjamin vedder or other company, developing a 100 v model? I am using 4.2 on ebike and it is superb, but I miss a 75 v PCB to operate my cyclone motor I'm working on a 12F VESC-compatible that can run up to 80V. It will use 100V mosfets, but the current sensors are limited to 80V....

Take a look at this thread: https://endless-sphere.com/forums/viewtopic.php?p=1418180 The circuit there is one way to do what you're asking. I used a variation of that circuit years ago to make a variable load for testing batteries. In my implementation I used a microcontroller to control the load a...

Hi Addy, Thank you !! My knowledge in electronics is quite limited, so I am very grateful for you help (not only you but all of you)! Would you have suggestions for the FET ? I have found some 200A capable FETs in DirectFET package : https://www.mouser.fr/ProductDetail/Infineon-IR/IRF7749L1TRPBF?qs...

Here's a circuit that would work for providing a regulated current: http://www.learningaboutelectronics.com/images/Current-source-circuit.png For this, you apply an adjustable voltage to the non-inverting input of the opamp. The opamp will try to keep the voltage on the sense resistor the same, so b...

I saw this earlier and thought this was kind of an odd design because the motors vents end up being covered. If you're going to use 2 motors to get more power, it seems counterproductive to make them worse at cooling. If you look at that guy's youtube channel, he's done a version 4 of his ebike desi...

The regulator that you linked is not a linear regulator, although it is made by the "Linear" company so that can be confusing. It's a switching converter, so it's much more efficient than a linear type. Check out the "POWER LOSS" curves on the first page. For 5V @ 300mA output, with an input of 140...

Oh sorry, I mixed the question about the current sensor with the one about the linear regulator. The linear regulator is rated 140V 400mA which means that at lets say 120V input while the circuit is consuming 5V there is 115V time let's say 300mA consumption which ends up to be 34.5W which is an in...

You'd have to select an appropriate wire gauge for the fuses. 120A out of an 8P pack would be 15A per cell, so your fuse wire should be able to pass 15A comfortably. You should also consider how much resistance the fuse wire will add to each cell. If your fuse wire gets hot under normal use, that h...

You'd have to select an appropriate wire gauge for the fuses. 120A out of an 8P pack would be 15A per cell, so your fuse wire should be able to pass 15A comfortably. You should also consider how much resistance the fuse wire will add to each cell. If your fuse wire gets hot under normal use, that he...

Yeah, if the cell is only slightly damaged, it could just slowly drain the parallel group. fuses.jpg I use a bus bar on the whole first and last parallel groups and solder the main wires to the busbar for even current distribution. It seems to not make sense since the busbar is a thick copper piece ...

In the picture you linked, it looks like the bus bar is soldered at one end, I assume this is where the series connection is made. Yes, the fuse wires are only for the parallel connections, to connect each cell to to the bus. This style of fusing gives you some protection when a single cell develops...

Alright, either I'm taking crazy pills here, or some eminent experts in the field have replied, and have failed to noticed that to get his simulation to work, he throttle limited both bikes. Higher voltages do not cause motors to heat up faster when you're throttle limiting them. 72v @ 12% throttle...

I don't think a clamp meter is accurate enough for this. Do you have multimeters that can measure current directly? If you can only measure voltage, you could put a shunt resistor in series with the fuse wire. Then you just need to measure the voltage across the shunt to calculate the current. For t...

Do you have access to any other mosfets? The 2N60C part you mentioned would not work well for this purpose unless your brake light uses very little power. The 2N60C is rated for 600V, much more than what's needed here. It's gate threshold voltage (voltage needed to turn it on) is 2-4V, sometimes 5V ...

30% extra speed took around 200w extra. 50% takes almost 400w on the 6374 I had on my bench. Probably not very accurate numbers as this was a calculated value from duty and noisy phase current reading, not battery shunt. I did my commute today with the "automatic" field weakening. It worked quite w...